Showing papers on "Disturbance (geology) published in 1971"

New polar magnetic disturbances: Sq p , SP, DPC, and DP 2

Abstract: The analyses that have led to the finding of a new polar magnetic disturbance are reviewed, and a unified picture is presented. Although the new disturbance has been reported under various names, an essential common feature is that the disturbance does not originate from the auroral electrojet. The high correlation observed between the disturbance and the orientation of the interplanetary magnetic field suggests that the disturbance reflects a basic interaction process between the solar wind and the magnetosphere.

The σ−and π−inductive effects

Abstract: The authors consider, in the absence of the usual terminology or symbols, the possible modes of electric disturbance that can be thought of as contributing to the overall electron distribution.

The Development of the Medium-scale Disturbance in the Baiu Front

Abstract: On July 04, 1969, severe precipitation took place over the Japan Islands with the passage of medium-scale disturbances along the Baiu front. The structure and the process of the development of the disturbance are analysed in detail by using the data of the Severe Rainstorms Research Project and satellite cloud pictures. The satellite and radar pictures show that the disturbance is accompanied by a well organized medium-scale cluster of convective clouds. Detailed analyses of rawinsonde data inside the disturbance revealed that the deepening of the surface pressure is deeply related to the formation of a mid-tropospheric warm core accompanied by a significant field of convergence in the lower troposphere. The high humidity in the warm core and the intense precipitation suggest that the formation of the walm core is due to the process of so-called convective warming, i.e. the release of latent heat and the upward transport of heat energy caused by cumulus convections. The formation of the convergence field is due to the increase of low-level wind velocity over the intense rainfall area. The active cumulus convections in the sheared westerly transport the momentum downward and therefore work to increase the low-level wind velocity.

The London “Crimp” Riots of 1794

Abstract: Though in recent years there has been a growth of interest in the subject of riot and disorder in eighteenth century England, little attention has been paid to anti-recruiting riots. These were, however, one of the most common forms of riot and disturbance in some areas; and in this study of the London riots of 1794 I hope to illustrate some of their features, particularly in the London context.

Prediction of short-term verbal memory disturbance after ventrolateral thalamotomy

Abstract: ✓ The acute change in short-term verbal memory following ventrolateral thalamotomy in patients with dyskinesia was measured by the technique of Peterson and Peterson. Performance on this test of short-term verbal memory deteriorated following left but not right ventrolateral thalamotomy. This deterioration could not be accounted for solely by disturbance in speech mechanisms after left thalamotomy (although these were present), but may be related to disturbance in retrieval mechanisms of short-term verbal memory. The relative magnitude of this deterioration in performance after left thalamotomy could be partially predicted at the time of operation by some of the effects of electrical stimulation of the ventrolateral thalamus on the same test. A large decrease in recall errors with stimulation during the presentation of material to be later recalled, and a small increase in recall errors with stimulation at the time of recall, correlated with little disturbance of short-term verbal memory following left th...

Stormtime disturbance fields at ATS 1

Abstract: Geomagnetic storm disturbance fields measurement by ATS 1 satellite compared with simultaneous low altitude observation, noting cavity sudden commencement compression effect

A mechanical method for obtaining soil cores

Abstract: Apparatus is described which enables large numbers of soil cores to be collected from depths up to 70 cm in small plot areas with little disturbance of the soil within the corers.

Affective Disturbance in Hypothyroidism

Abstract: Thirty consecutive patients diagnosed as hypothyroid were examined before and after treatment with thyroxine. There was no significant correlation between the severity of affective disturbance and the disease process. Most improved subjectively after treatment, though the improvement was only marginal on objective psychiatric assessment. A higher incidence of affective disturbance was found in the first degree relatives of depressed patients, though this finding was not statistically significant.

The Loading Equilibrium Examination for Etiologic Diagnosis of Menibre's Disease

Abstract: Loading equilibrium examinations were carried out to diagnose the etiologic factors in the labyrinthine disturbance in individual cases of Menitre's disease. The examinations were designed to estim...

Transient Motions Induced By Local Disturbances In A Linearly Density-Stratified Fluid

Abstract: The internal hydrodynamic motion induced in a linearly tratified fluid by an arbitrary two dimensional disturbance were determined and closed form integral expressions for the solution are presented Two fundamental solutions for the motion subsequent to an intial disturbance were obtained These correspond to the hydrodynamic motions resulting from two particular forms of the initial disturbance: an initial displacement of the water mass from the position of static equilibrium (distortion of isopycnal lines); and an initial velocity distribution throughout the water mass The complete solution resulting from an arbitrary disturbance is a superposition of the two basic solutions with appropriate forcing functions The solutions are compared with available experiments and numerical results

San francisco's nineteenth-century egg basket: the farallons*

Abstract: URING the past century and a half, man has laid a heavy hand on the birds and mammals of the Farallon Islands. By constructing habitations and navigational aids, he has altered the physical aspect of the largest, most accessible, and most southerly of the group, Southeast Farallon. Current environmental change in the Bay Area continues apace. The imperative that the only good wetland is a reclaimed one dies hard in California; San Francisco Bay's eastern shore will soon be graced by commercial buildings on filled tidelands around Emeryville, and interested parties continue to push for extending SanJose's airport into the tidal flats of the South Bay. However, paradoxically, human traces are being erased from the Farallon Islands. Measures are being implemented to make the Farallons, with the exception of the long-inhabited Southeast Island, a National Wilderness Area in accordance with the Wilderness Act of September 3, 1964.1 The move was precipitated by economy measures planned by the United States Coast Guard to automate the light and to withdraw its crew. For 115 years federal personnel have manned the marine terraces and rugged treeless peaks of Southeast Farallon, twenty-five miles west of the Golden Gate in the Pacific (Fig. 1). During the present century public access to the island has been restricted by the Light House Service and the Coast Guard, partly to prevent interference with the smooth running of the community stationed there, and partly to protect the wildlife of the island from undue disturbance. Since Southeast Farallon is close to the major metropolitan centers that ring San Francisco Bay, the varied marine fauna requires special care, both to allow rehabilitation of depleted populations and to further understanding and appreciation among the general public. With this end in mind the Point Reyes Bird Observatory, with the permission and cooperation of the Coast

Insulated trafficked surfaces

Abstract: Trafficked surfaces built on foundations which remain substantially undisturbed during seasonal climatic cycles, particularly in permafrost and near permafrost regions where considerable disturbance of the ground beneath foundations is otherwise common. The foundations include combinations of insulation layers, heat sinks and/or thermal bleeds which dampen and prevent the cyclic climatic seasonal variations from affecting the earthen support under the foundations, in both cut and fill sections, and in embankments and backfills adjacent the sections.

Emotional disturbance accompanying the treatment of parkinsonism with L‐dopa

Abstract: This paper reports a study, using systematic observation, interview, and psychological examination, in a sample of 34 patients receiving L‐dopa for parkinsonism. Our results do not support the suggestion that disturbances of mood and behavior are to be expected. We concluded that the chances of adverse emotional side reactions to L‐dopa appear to be minimal when the dosage level does not exceed 4 Gm. per day and the subjects are emotionally stable prior to treatment.

Mental disturbance in doctors.

Abstract: few from such unusual areas as the retroperitoneal region, broad ligament, breast, omentum, mesentery and small intestine, and the pelvic floor. The treatment consisted in excision of the tumour and the surrounding tissues, including the superficial fascia. Twelve patients required an amputation, 11 of these through the pelvic or pectoral girdles. Two patients died with widespread inoperable tumour involving the abdomen and the neck respectively, but more than half the others were free of recurrence five years later. About a fifth of the patients with intact primary tumours developed local recurrences after a wide incision. But of those who came already suffering from a recurrence after the primary lesion had been excised elsewhere a third relapsed after the second resection had been carried out at the Memorial and James Ewing Hospitals. The nature of the desmoid tumour has aroused much speculation. It has been regarded by some as a benign overgrowth of the fibrous tissue, a so-called fibromatosis, related to the juvenile and plantar fibromatoses and to keloid.5 6 These lesions are regarded as an excessive reparative reaction to trauma rather than true neoplasms. In Das Gupta and his colleagues' series trauma appeared to play little part in the aetiology of the condition, and in morphology the lesions resembled neoplastic masses. Whatever the nature of the desmoid tumour, there is no doubt that a radical excision of all affected tissue can alone ensure cure.

The effect of seedling disturbance on the growth habit and yield of swedes

Abstract: SUMMARY The effect of seedling disturbance on the yield and growth habit of swedes was studied in ten experiments during the period 1960–3. Seedling disturbance consisted of the removal of soil from around the seedlings during singling, thus exposing the hypocotyl and leaving the seedlings prostrate. Plant numbers were reduced slightly by seedling disturbance in half the experiments but not sufficiently to be a source of yield loss at the populations attained. Seedling disturbance greatly increased the incidence of prostrate growth in swede varieties of intermediate shape, such as Victory. Two globe-shaped varieties, Bangholm and Pentland Harvester, grew erect irrespective of singling technique. Disturbance of seedlings reduced yield when it increased the number of prostrategrowing plants. The yield depression ranged from 0·2 to 5·2 cwt D.M./acre.

Plate Consumption: Some Comments from an Island Arc

Abstract: A COROLLARY of lithospheric plate creation on an Earth of stable radius is that plate is also consumed. The island arcs with their phenomena of intense geophysical disturbance form the logical sinks, and the subduction theory of geosynclines has recently been added to the theory of plate consumption at island arcs.

Surface Disturbance from Submerged Jet

Abstract: A submerged vertical jet of water impinging on a free surface produces a disturbance at the still water level. The disturbance height and other characteristics of the surface profile depend upon the momentum of the jet, the diameter and depth of submergence of the nozzle from which the jet originates, and the physical properties of the fluids which are contiguous at the interface. Equations are presented which enable the height and appearance of the disturbance to be predicted.